//less没有循环语法,因此使用for循环
.adapterMixin(@index) when ( @index > 0 ){
    @media (min-width: extract(@adapterDeviceList,@index)){
        html {
            font-size: @baseFontSize / @psdWidth * extract(@adapterDeviceList, @index);
        }
    }
    .adapterMixin( @index - 1);
}
